"...a non-lethal, directed-energy weapon developed by the U.S. military. It is a strong millimeter-wave transmitter primarily used for crowd control (the "goodbye effect"). [...] Informally, the weapon is also called pain ray."
14 August 2011
Anti-Riot Tech ~ "Pain Ray" Active Denial System
To combat riotous scum, additional tools are needed. The Active Denial System looks promising...